John Raines
Forum Replies Created
-
Yes, I did, from https://www.aja.com/en/support/legacy/kona-lhe.
-
Input Gain is a constant level adjustment made before the compressor does any work. Output Gain is a constant level adjustment made after the compressor does its work. The threshold is the level at which the compressor begins to squeeze the dynamic range by the amount specified.
For example, if you set the threshold to -12 and the amount to 5:1, any audio below -12 will be unaffected. A peak of -7, 5 dB higher than the threshold, will be reduced by a factor of 5 and become only 1 dB higher, or -11.
-
Also called alignment level, reference level is a way to match audio levels between programs from disparate sources. In the analog days, the absolute level could be very different depending on the type of tape and recording equipment used. If everyone puts a test tone at the head of the recording, and then their program material relates to it in a predictable way, it’s possible to adjust each playback to the same absolute level.
There is much less need for tones now that we are using a digital scale but it’s still in the specs for some outlets. If you are required to put a test tone on your submission, you will need to generate a file in another program and then bring it into the timeline. I make tones in Adobe Audition; there are freeware program to do it, too.
-
Whether to apply compression and how much compression to use is an artistic choice. It’s fine for dialog and narration but may destroy the impact of dramatic sound effects and concert music.
-18 dBFS (or -20 or whatever) is a REFERENCE level. That’s where you put your reference tone. Average program material is supposed to peak near this level. Exceptional program material may be much softer or louder. Every distribution channel has its own standards.
In the U.S., average program level is now governed by the CALM Act. It mandates a target level of -24 LKFS for the “anchor element” of a program (normally dialog but could be music in a concert format). LKFS is based on perceived loudness and is not the same as dBFS. You need special meters or analytics to evaluate it.
-
I appreciate the research. But my original question remains. The test card JPEG looks fine in Photoshop. But it’s crushed at the black end in Vegas with no filters applied. It looks crushed, it scopes crushed, and it renders crushed to an MP4. A PSD copy has no such problem. I must conclude there is a problem with Vegas’ JPEG plugin.
-
Oops, that did sound a bit contradictory! I mean that you may find vegas110.exe in the list of running processes on the Process tab of Task Manager, even though no Vegas windows are visible on the desktop.
-
Check the Task Manager Processes tab and if there any invisible instances of vegas110.exe running, terminate them.
-
This appears to be a problem only with Vegas-64. Everything works properly in Vegas-32.
-
I can confirm this bug in Build 683 64-bit.
-
Shameless bump.